Oil-switchboard.



H. F. KRANTZ.

OIL SWITCHBOARD.

APPLICATION man www. 191s.

Patented July 16, 1918.

MMVI/l UNiTEn sTATEs PATENT oEEicE.

HUBERT F. KRANTZ, or BRooKLYN, NEW Years, assIcNon To KRANTZ MANUFACTUR- ING coMrANY ING., or BROOKLYN, NEW YORK, A ooR-ronaTIoN or NEW YORK.

Application inea May 19, 191s.

To all whom t? may concern:

Be it known that I, HUBERT F. KEANTZ, a citizen of the" United States,- residing at Brooklyn; in the' county of Kings, city and State of New York, have invented certain new and useful lrnproveinents in Oil- Switclfrboards, of which thefollo-wing is a cl'eair,` tolli, and exact description.

This invention relates to a switch or panel board, in which the current to be distributed by the board is of such magnitude as tonecessitate the breaking of the electrical cir'- cuits in' a bath of oil or other insulating` fluid other than the atmosphere in order to prevent' undue arcing. of theparts.

It has been before proposed, and etten carried out, to break electrical circuitsin what is known as an oil switch, which is a switch in which the contacts for the' circuit are immersed in oil.- lt 4has been the habit and the custom when such switches are to be used on panel boards to mount such oil switch onthe b'oard, connect its contacts by strips ot copperlto thed ordinary bus barsot the* board,- which are located outside ojli the switch and to connect the branch circuit wires for distribution tocross bars, in turn connected by strips to the oil switches.

Such oil switches in the above mentioned constructions become in reality an additional binden to be carried by the board to take up room on the .board and tonecessitate more electrical joints than would be used in, the ordinary construction ot a panel board without the loil switch boards.

lt is the' object of my invention to so mount the bus bars and switch contacts that they will occupy the ordinary operative position on the back board, which they could and would occupy if no oil switches were used, and to inc-ase and inclose the bus bars and switch contacts in an oil bath. I further prefer that an oil bath bemaintai'i'ied across one level of the switch board so that one bath will take in a plurality oit sifitclies and one set ot bus bars,l and this may be carried to such a degreewith advantage that across the entire width of vboard one inclosing tank may be positioned to inclose the bus barsl and switch contacts, and the entire inclosure including the tank mounted directly on the back board, occupying no more space than an ordinary non-oil switch board would occupy7 and producing a simple7 cheap and comparatively inexpensive and etlicient Specification of Letters Patent.

Patented July 16, 1918'.

seria'r No. 768,416.

structure: for installation,` maintenance and repair,

The scope o1" i'ny invention will be pointed out in the claims.

ln the accompanying drawings: Figure l is a tace view of' a portion ot panel board equipped with my invention.- Fig.- 2 is a section on line 2 2 Fig. Fig. 3 is a section on line Fig. Fig. 4 is a section on line Fig.- 3. As shown in the drawing, the back boa-rd l isgpreterably provided with a switch protruding to handles 2 having` ashaft 3 passing through the board and carryingv a sprocket wheel t on its inner end. The handle and sprocket wheel and Switch opera-ting: mechanism,- which i shall describe is only one torni which may be' use'd.- lt is whatis known as kthe slow-break type'. l attach to the back plate a tank 5, .vhich may have the let-off cock (i and lo the base ot the tank on asili-table insulation' 7 niount parallel one to the other thel bus bars S', which may be plain straight bars or carry lugs 9 for switch Contact, such shown in the drawings. y I l y In the drawings I have shown Vtwo ofl these bus bars 8. In a three-*wire circuit it is obvious that there would be three ot these instead of two. In the tank 5,v l rotatably nronnt on suitable supports a rod l0 properly insulated by insulating' blocks ll a pair ot switch contactl blades l2 and 13. provide a sprocket-.14A on theshatt l0 and a sprocket chain l5 connecting` the sprocket llt with the 4sprocket' 4l. so that on rotation ot the handle the switch contact blades will be rotated to connect directly with the bus bar or the lug 9 tl'ierco't, it it is desired to save copper in the consti-(fetich. 'lhe board could b'e a st'iifit bar .vithou't the lugs, as willjbe o'bviou Aboveeach switch Contact blade, and adapted to be contacted witlii it, l carry branch circuit switch conta'cts'lt' i'i'ioui'i'ted in' an ixx'suiztted .bise i7 permanently secured to the tank by brackets 18. branch circuit comiectors 19' being tastened to such additional circuit switch contact blocks. The leading-in wires for power are shown at 2O connected to the bus bar 8, which are bent as shown in Fig. 2 to permit them to pass out of the tank for joinder with the leading-in wire 20.

Besides the advantage secured by this construction as to the oil switch arrangement, it will be noted that the construction shown permits the mounting of both bus bars and branch circuit contacts on supports at right angles to the back plate, so that the switch contact blades may contact directly with such bus and cross bars, and that a clear free plane will be provided between bus and contact blocks of opposite polarity without the crossing of cross bars, an advantage particularly pointed out in several of my co-pending applications for panel and switch boards, particularly that led September 27th, 1911, No. 651,565, matured into Patent #1,172,371, Feb. 22, 1916.

I claim as my invention:

1. An apparatus of the character described, comprising, in combination, a switch board, a covered'container secured to one side thereof adapted to be illed with an insulating fluid, a pair of parallel bus bars therein having conductors connected therewith and passing out of said container, a plurality of coacting multipolar means above said bus bars adapted to be connected with conductors leading to a plurality of dierent conduits, a plurality of individual switching means in said container between said cross bars and said plurality of means for completing the circuit, said switching means coacting directly with said bus bars, and means without said container on the opposite side on said switch board for actuating said switch means through the cover of said container.

2. A switch-mechanism combining an elongated container; elongated negative and positive bus-bars arranged within a lower region of said container and located in adjacent parallel vertical planes extending lengthwise of said container; a series of negative branch-line terminals all arranged in the plane of the negative bus-bar and located above the same; a series or" positive branchline terminals similarly located in the adjacent plane; a series of switch-blades arranged in said container; and means for individually actuating said blades to establish connection between said terminal and said bus-bars.

3. An oil switch mechanism combining an elongated oil container, a bus bar arranged longitudinally within said container in, a position to stand beneath oil which may be contained within the container, means eX- tending into the container for connecting a conductor to said bus bar, a series of branch line terminals also within the container, said branch line terminals being spaced apart longitudinally of said bus bar and being located in a plane above the bus bar, a series of switch blades also arranged within the container one for each branch line terminal, and means for individually actuating said switch blades to establish connection between the respective branch line terminals and said bus bar.

4. An oil switch mechanism combining a container having imperforate bottom and 'side walls and being adapted to contain a quantity of oil therein, a bus-bar having a part extending downwardly into said container and having another part extending along the bottom wall of the container adapted to stand beneath the level of oil within the container, a plurality of switch devices spaced apart along the length of the last mentioned portion of the bus-bar, and means extending exteriorly of the container independently operable to cause said switch devices respectively to make and break contact with the bus-bar at will.

5. An oil switch mechanism combining a container ladapted to contain a quantity ot' oil, a bus-bar arranged within the container, a plurality of branch-line contacts arranged within the container spaced from the bus-- bar and spaced apart along the length of the bus-bar, a pair of insulating plates carried by the container for supporting the bus-bar and the branch-line contacts one adapted to retain the bus-bar in a position beneath the level of oil within the container and the other adapted to support the branch-line contacts in a position in the upper portion of the container, a plurality of switch blades arranged within the container one t'or each of said branch-line contacts, and means to operate said switch blades for connecting the branch-line contacts respectively with th bus-bar.

Signed at Brooklyn, in the county oi' Kings, city and State of New York, this 16th day of May, 1913.

HUBERT F. KRANTZ.

` Witnesses:

J. A. NEWTON, S. L. WHITLOGK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

